Corkscrew



FIG. 1 is a front, side and bottom view of a corkscrew, showing our new design;

FIG. 2 is a front elevation view thereof, shown in a second position of use;

FIG. 3 is a front view thereof, shown in a third position of use;

FIG. 4 is a back view thereof, shown in the second position of use;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the Figures depict environmental subject matter and form no part of the claimed design. 

The ornamental design for a corkscrew, as shown and described. 